Smoke-consuming attachment for furnaces.



No. 886,597.. PATENTED NOV. 20, 1906. L. D. MOHLEE. SMOKE OONSUMING-ATTAGHMENT FOR FURNACES.

APPLICATION FILED AUG. 22. 1905.

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No. 836,597. PATENTED NOV. 20, 1906. L. D. MOHLER.

SMOKE GONSUMING ATTACHMENT FOR FURNACES.

' APPLIO-ATION FILED AUG. 22,.1905.

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UNITED STATES PATENT OFFICE.

LEVI D. MOHLER, OF MCPHERSON, KANSAS. 'SMOKE-CONSUIVlING ATTACHMENTFORFURNACES.

Specification of Letters Patent.

Patented N0v;20,51906.

Application filed August 22, 1905. Serial No. 275,318.

character bythe use of which the solid particles in the smoke will be completely consumed, so as to pass off entirely in a gaseous state.

A further object is to increase the heating efficiency of the furnace and also to provide a condition which is so highly favorable to combustion that comparatively low grades of fuel can be employed.

With these objects in view the invention consists, essentially, of air-passages adapted to conduct air over the fuel and of walls adapted to confine the products of combustion and the heated air in close contact with the burning fuel.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings, in which Figure 1 is a transverse sectional view on Fig. 2 is a longitudinal sectional view through the furnace. Fig. 3 is a transverse sectional view through the fire-box. Fig. 4 is a similar view showing a modification in which the front arch is composed of two spaced members. Fig. 5 is a longitudinal sectional view through a portion of the furnace and shows the method of conveying air from the front of the furnace to the combustion-chamber.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The invention is illustrated as applied to a steam-boiler, which maybe of any suitable type and in which'the numeral 1 designates the boiler, 2 the fire-box, 3 the grate, and 4 the ash-pit. which are spaced from each other and also from the front of the furnace, are located in the upper part of the combustion-chamber. Air-passages 7 are located in the walls of the Two archesor walls 5 and 6,

furnace, so as to conduct air from the- -ash-pit to the lower side of the arch 5. The arch 6 is provided with perforations 8, and the lower side thereof is made irregular, as seenat 9, so as to present a largeheating-surface. The upper surface of the bridge 10 is also made irregular for the same purpose. Air-passages 11 are located on the sides of the furnace between the arches 5 and 6 and are employed to conduct air from the ash-pit to thespacebetween the bridge 10 and the arch 6. The lower ends of the air-passages" 7 and llare controlled by dampers 12, so thatthe quantity of air passing through them can be regulated. A wall or partition 13 is: placed between the lower side of the boiler-and the rear end of the arch 6, so that the products of combustion are compelled to pass between the bridge 10 and said arch.

The arch 5 becoming intensely heated confines both the heat rising from-:the fire and the air admitted through the passages 7 and holds them in close relation to the fire and fuel, thereby raising-the temperature to the highest possible degree for the purpose of causing the instant combustion of the rising gases and smoke and also tends to establish a state of combustion over the upper surface of the fuel, so that it will burn from the top downward at the earliestpossible moment after fresh fuel is placed in-the fire. Owing to the fact that the arch 5 accumulates heat, a sufficiently high temperature can always be obtained to thoroughly consumethe solid particles in the smoke even during thegperiods of greatest production, as when fresh fuel is placed upon the fire. The products of combustion then in part pass around, :so as to heat the boiler, and finally emerge through the space between the two'arches andthe perforations 8 in the arch 6 into the spacebetween said arch and the bridge 10, where they are intensely heatedand mixed'with the heatedaircoming throughthe passages 11 and any remaining solidparticles-thus-consumed.

In wide furnacesthe aircoming through the passages 7 may not reach'the'center of the furnace in a sufficient quantity-and =it may be found desirable toem loy a passage 14,-leading from the front ofte furnace and adapted to convey'air to the center ofthe arch 5. It may also be found desirableunder certain circumstances to form the arch 5 in two sections 15 and 16, the lower section 16 being provided with perforations 17.

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The air-passage7 will then be arranged so as to conduct the air. between the sections and 16, so that it will pass into the combus tion-chamber through the erforations 17. This enables the air to be highly heated, so as to eliminate any danger of producing a chilling effect, and also cools the arch 5, so as to prolong the life of same.

Having thus described the invention, what is claimed as new is 1. Ina smoke-consuming furnace, the combination of a combustion-chamber, a wall or partition connecting the sides of the chamber and located between the burning fuel and the top of the furnace, said wall being so disposed as to enable the products of combustion to pass around one end thereof and over the same, and the walls of the combustionchamber being provided with passages which are adapted to direct air into the chamber and immediately below the wall, a second wall located at one end of the first-mentioned wall and spaced therefrom, and means for causing all the products of combustion to pass under the second-mentioned wall.

2. Inasmoke-consuming furnace, the combination of a combustion-chamber, a wall or partition connecting the sides of the combustion-chamber and located between the burning fuel and the top thereof, the sides of the combustion-chamber being provided with passages for admitting air under the before mentioned wall, a bridge at one side of the combustion-chamber, a second wall or partition spaced from the first wall and located opposite the bridge, and means for causing t 1e products of combustion to pass between the second-mentioned wall and the bridge.

3. In a smoke-consuming furnace for boilers, the combination of a boiler, a combustion-chamber the sides of which are provided with passages for leading air into the upper ortion of said chamber, a wall or partition ocated between the burning fuel and the boiler, a bridge, a second wall spaced from the first wall and located opposite the bridge, and means for causing the products of combustion to pass between the second-mentioned wall or artition and the bridge.

4. In a smofze-consuming furnace for boilers, the combination of a boiler, a combus- -tion-chamber the sides of which are provided with passages for leadingair from the ash-pit to the upper portion of said chamber, a wall or partition located between the burning fuel and the boiler and adapted to reflect the heat and hold the products of combustion and the air which comes through the passages in contact with the burning fuel, and a second wall or partition spaced from the first wall and located opposite the bridge so that the products of combustion will pass between the bridge and second wall, the sides of the combustion-chamber being provided with air-passa 'es which are located between the spaced wa ls and are adapted to supply air to the products of combustion immediately before they pass between the bridge and the second wall. I

5. In a smoke-consuming furnace for boilers, the combination of a boiler, a combustion-chamber the sides of which are provided with passages for leading air to the upper portion of said chamber, a wall or partition 10- cated between the burning fuel and the boiler, a second wall spaced from the first wall and located opposite the bridge, said second wall being provided with perforations, and a artition between the second wall and the boiler so that the products of combustion will be forced to pass under the second wall.

6. In a smoke-consuming furnace for boilers, the combination of a boiler, a combustion-chamber the sides of which are provided with passages for leading air to the upper portion of said chamber, a wall or partition located between the burning fuel and the boiler, asecond wall spaced from the firstwall and located opposite the bridge, said second wall being provided with perforations, and a artition between the rear end of the second wall and the boiler so that the products of combustion will be forced to pass under the second wall, the sides of the combustionchamber being provided with air-passages which are located between the spaced walls and are adapted to su ply air to the roducts of combustionimme iately before t ey pass between the bridge and the second wall.

7. In a smoke-coi1suming furnace for boilers, the combination of a boiler, a combustion-chamber the sides of which are provided with passages for leading air to the upper portion of said chamber, a wall or partition located between the burning fuel and the boiler, a bridge, a second wall spaced from the first-mentioned wall and located opposite the bridge, and means for causing the prod nets of combustion to pass between the second wall and the bridge, the sides of the combustion-chamber being provided with airpassages which are located between the spaced walls and are adapted to supply air to the products of combustion immediately before they pass between the bridge and the second wall.

In testimony whereof I affix my signature in presence of two witnesses.

LEVI n. MOHLER. 

